HYDROGEN, AIR & HELIUM - Jason stands behind three balloons, two floating upward and one hanging downward from a bar. One balloon is filled with helium, the next, hydrogen and the third, a combination of air and carbon dioxide. Mr. Wizard challenges Jason to determine which is which. WHAT IS THIS? - This may look like a ripe banana, but it's only five millimeters long. That's about one quarter-of-an-inch. People call it a seed, but it's really the fruit of a plant related to the carrot. USES FOR STATIC ELECTRICITY - Mr.Wizard rubs a balloon on his sweater and puts it under Leila's nose where it remains. She says it does so because of static electricity. He explains that when you rub wool or animal fur against a balloon, you are rubbing electrons off the fur and onto the balloon. There are many uses for Static Electricity. RULER & TV SCREEN - Mr.Wizard waves a stick in front of a blank television set. Darren tries the same and they count five images seen in front of the screen. They discuss stroboscopic effect. The television set is presenting a new picture sixty times a second. BLAST ENGINEERING - Digging a tunnel like this is a big job. As you know, explosives are sometimes used to blast through the rock. But nearby are houses, offices, and shops with people going about their daily lives. What's the best way to blast through rock with the least possible disturbance? BONE STRENGTH - Mr.Wizard Explains why bones are strong. HOW MANY OCEANS ARE THERE ? - Long ago, sailors ventured out on the seven seas. Mr. Wizard answers.STRAW CHALLENGE – Mr.Wizard challenges AJ to sip grape juice through a drinking straw. Then he has AJ use 2 straws, see what happens.moreless
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